From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,MIME_HEADER_CTYPE_ONLY,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_TVD_MIME_NO_HEADERS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE840C00A89 for ; Mon, 2 Nov 2020 03:55:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 780CC2145D for ; Mon, 2 Nov 2020 03:55:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="iQ8Gtgx8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727806AbgKBDzW (ORCPT ); Sun, 1 Nov 2020 22:55:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727888AbgKBDzU (ORCPT ); Sun, 1 Nov 2020 22:55:20 -0500 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE115C0617A6 for ; Sun, 1 Nov 2020 19:55:20 -0800 (PST) Received: by mail-pf1-x443.google.com with SMTP id 10so9923078pfp.5 for ; Sun, 01 Nov 2020 19:55:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=+c09gSHzirt9O+okE0QmVELqHswcOaAl4j0q9ETC4PM=; b=iQ8Gtgx8SIBRHqaEg9LquXzey1/ndXKVZQ27PoBDyhKgLYDGDeRE+3Aau7RBLMGLlp vPG4kprWEVnxe3KPs6XRmT+oW4x0KGixVbhMD22jitI89KFZ+mPn4CByD+m/WCMfJtIk cFMe12BiFF6N9fkFsHo66m9VCH7ILZnjSgT4E= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=+c09gSHzirt9O+okE0QmVELqHswcOaAl4j0q9ETC4PM=; b=oNJ8InXooX605mLvS+lppbBEXFy3SpqK0swJXUdnfNHihY0AntEx+K9nbA3HCpvnDc P5OR1draiJqqE7m0CKtkFLyk1QNpC8JWAmjwyoxw3f3WQWem3Tck4CaTideFDmNciD2g d0wD9eFh0zu4TKs/pU1EAkxR2XG0Xdvkre97kTht6hEu8YSU0FWwt7QcPmR5APrktzdO /RGdX5ZzMwYumk2t8vFL/mlxwPC2iYIxADekr9pZqttpR/J2+YWPxAJZ8Yg8QK8aUm4/ agQpwZEi+Noyy2RtSfWnf9ErmXiK8MFtKwOCcaP6YnqbMinj/o0hlCbMtFTbRox5rKLH /Zwg== X-Gm-Message-State: AOAM530cdTdyJLEgqg26DFORPDPw/ZkTNFxiQbV83m0YEHVNfU++1CHq qL04pUe5aouTFQ/StEXxjktS3g== X-Google-Smtp-Source: ABdhPJyjhHDYm+I40geGi/eSntY8YCxTXWDj0z8+PdUxieeYJEIi6M04zchVLuzttnIUXwGqK7RZaQ== X-Received: by 2002:a62:e308:0:b029:152:8cc3:ebdc with SMTP id g8-20020a62e3080000b02901528cc3ebdcmr20143680pfh.42.1604289320107; Sun, 01 Nov 2020 19:55:20 -0800 (PST) Received: from rayagonda.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id y5sm5655711pfc.165.2020.11.01.19.55.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Nov 2020 19:55:19 -0800 (PST) From: Rayagonda Kokatanur To: Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, Wolfram Sang , Florian Fainelli , Brendan Higgins , Andy Shevchenko , Lori Hikichi , Dhananjay Phadke , linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Rayagonda Kokatanur Subject: [PATCH v3 6/6] i2c: iproc: handle rx fifo full interrupt Date: Mon, 2 Nov 2020 09:24:33 +0530 Message-Id: <20201102035433.6774-7-rayagonda.kokatanur@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201102035433.6774-1-rayagonda.kokatanur@broadcom.com> References: <20201102035433.6774-1-rayagonda.kokatanur@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000010cabb05b317b797" Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org --00000000000010cabb05b317b797 Add code to handle IS_S_RX_FIFO_FULL_SHIFT interrupt to support master write request with >= 64 bytes. Iproc has a slave rx fifo size of 64 bytes. Rx fifo full interrupt (IS_S_RX_FIFO_FULL_SHIFT) will be generated when RX fifo becomes full. This can happen if master issues write request of more than 64 bytes. Signed-off-by: Rayagonda Kokatanur --- drivers/i2c/busses/i2c-bcm-iproc.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c index 22e04055b447..cceaf69279a9 100644 --- a/drivers/i2c/busses/i2c-bcm-iproc.c +++ b/drivers/i2c/busses/i2c-bcm-iproc.c @@ -313,6 +313,8 @@ static void bcm_iproc_i2c_slave_init( /* Enable interrupt register to indicate a valid byte in receive fifo */ val = BIT(IE_S_RX_EVENT_SHIFT); + /* Enable interrupt register to indicate Slave Rx FIFO Full */ + val |= BIT(IE_S_RX_FIFO_FULL_SHIFT); /* Enable interrupt register to indicate a Master read transaction */ val |= BIT(IE_S_RD_EVENT_SHIFT); /* Enable interrupt register for the Slave BUSY command */ @@ -434,9 +436,15 @@ static bool bcm_iproc_i2c_slave_isr(struct bcm_iproc_i2c_dev *iproc_i2c, * events * Master-read : both IS_S_RX_EVENT_SHIFT and IS_S_RD_EVENT_SHIFT * events or only IS_S_RD_EVENT_SHIFT + * + * iproc has a slave rx fifo size of 64 bytes. Rx fifo full interrupt + * (IS_S_RX_FIFO_FULL_SHIFT) will be generated when RX fifo becomes + * full. This can happen if Master issues write requests of more than + * 64 bytes. */ if (status & BIT(IS_S_RX_EVENT_SHIFT) || - status & BIT(IS_S_RD_EVENT_SHIFT)) { + status & BIT(IS_S_RD_EVENT_SHIFT) || + status & BIT(IS_S_RX_FIFO_FULL_SHIFT)) { /* disable slave interrupts */ val = iproc_i2c_rd_reg(iproc_i2c, IE_OFFSET); val &= ~iproc_i2c->slave_int_mask; @@ -452,9 +460,14 @@ static bool bcm_iproc_i2c_slave_isr(struct bcm_iproc_i2c_dev *iproc_i2c, /* schedule tasklet to read data later */ tasklet_schedule(&iproc_i2c->slave_rx_tasklet); - /* clear only IS_S_RX_EVENT_SHIFT interrupt */ - iproc_i2c_wr_reg(iproc_i2c, IS_OFFSET, - BIT(IS_S_RX_EVENT_SHIFT)); + /* + * clear only IS_S_RX_EVENT_SHIFT and + * IS_S_RX_FIFO_FULL_SHIFT interrupt. + */ + val = BIT(IS_S_RX_EVENT_SHIFT); + if (status & BIT(IS_S_RX_FIFO_FULL_SHIFT)) + val |= BIT(IS_S_RX_FIFO_FULL_SHIFT); + iproc_i2c_wr_reg(iproc_i2c, IS_OFFSET, val); } if (status & BIT(IS_S_TX_UNDERRUN_SHIFT)) { -- 2.17.1 --00000000000010cabb05b317b797 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQVwYJKoZIhvcNAQcCoIIQSDCCEEQCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg2sMIIE6DCCA9CgAwIBAgIOSBtqCRO9gCTKXSLwFPMwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UE CxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMT Ckdsb2JhbFNpZ24wHhcNMTYwNjE1MDAwMDAwWhcNMjQwNjE1MDAwMDAwWjBdMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEzMDEGA1UEAxMqR2xvYmFsU2lnbiBQZXJzb25h bFNpZ24gMiBDQSAtIFNIQTI1NiAtIEczMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA tpZok2X9LAHsYqMNVL+Ly6RDkaKar7GD8rVtb9nw6tzPFnvXGeOEA4X5xh9wjx9sScVpGR5wkTg1 fgJIXTlrGESmaqXIdPRd9YQ+Yx9xRIIIPu3Jp/bpbiZBKYDJSbr/2Xago7sb9nnfSyjTSnucUcIP ZVChn6hKneVGBI2DT9yyyD3PmCEJmEzA8Y96qT83JmVH2GaPSSbCw0C+Zj1s/zqtKUbwE5zh8uuZ p4vC019QbaIOb8cGlzgvTqGORwK0gwDYpOO6QQdg5d03WvIHwTunnJdoLrfvqUg2vOlpqJmqR+nH 9lHS+bEstsVJtZieU1Pa+3LzfA/4cT7XA/pnwwIDAQABo4IBtTCCAbEwDgYDVR0PAQH/BAQDAgEG MGoGA1UdJQRjMGEGCCsGAQUFBwMCBggrBgEFBQcDBAYIKwYBBQUHAwkGCisGAQQBgjcUAgIGCisG AQQBgjcKAwQGCSsGAQQBgjcVBgYKKwYBBAGCNwoDDAYIKwYBBQUHAwcGCCsGAQUFBwMRMBIGA1Ud EwEB/wQIMAYBAf8CAQAwHQYDVR0OBBYEFGlygmIxZ5VEhXeRgMQENkmdewthMB8GA1UdIwQYMBaA FI/wS3+oLkUkrk1Q+mOai97i3Ru8MD4GCCsGAQUFBwEBBDIwMDAuBggrBgEFBQcwAYYiaHR0cDov L29jc3AyLmdsb2JhbHNpZ24uY29tL3Jvb3RyMzA2BgNVHR8ELzAtMCugKaAnhiVodHRwOi8vY3Js Lmdsb2JhbHNpZ24uY29tL3Jvb3QtcjMuY3JsMGcGA1UdIARgMF4wCwYJKwYBBAGgMgEoMAwGCisG AQQBoDIBKAowQQYJKwYBBAGgMgFfMDQwMgYIKwYBBQUHAgEWJmh0dHBzOi8vd3d3Lmdsb2JhbHNp Z24uY29tL3JlcG9zaXRvcnkvMA0GCSqGSIb3DQEBCwUAA4IBAQConc0yzHxn4gtQ16VccKNm4iXv 6rS2UzBuhxI3XDPiwihW45O9RZXzWNgVcUzz5IKJFL7+pcxHvesGVII+5r++9eqI9XnEKCILjHr2 DgvjKq5Jmg6bwifybLYbVUoBthnhaFB0WLwSRRhPrt5eGxMw51UmNICi/hSKBKsHhGFSEaJQALZy 4HL0EWduE6ILYAjX6BSXRDtHFeUPddb46f5Hf5rzITGLsn9BIpoOVrgS878O4JnfUWQi29yBfn75 HajifFvPC+uqn+rcVnvrpLgsLOYG/64kWX/FRH8+mhVe+mcSX3xsUpcxK9q9vLTVtroU/yJUmEC4 OcH5dQsbHBqjMIIDXzCCAkegAwIBAgILBAAAAAABIVhTCKIwDQYJKoZIhvcNAQELBQAwTDEgMB4G A1UECxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNV BAMTCkdsb2JhbFNpZ24wHhcNMDkwMzE4MTAwMDAwWhcNMjkwMzE4MTAwMDAwWjBMMSAwHgYDVQQL ExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UEAxMK R2xvYmFsU2lnbjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMwldpB5BngiFvXAg7aE yiie/QV2EcWtiHL8RgJDx7KKnQRfJMsuS+FggkbhUqsMgUdwbN1k0ev1LKMPgj0MK66X17YUhhB5 uzsTgHeMCOFJ0mpiLx9e+pZo34knlTifBtc+ycsmWQ1z3rDI6SYOgxXG71uL0gRgykmmKPZpO/bL yCiR5Z2KYVc3rHQU3HTgOu5yLy6c+9C7v/U9AOEGM+iCK65TpjoWc4zdQQ4gOsC0p6Hpsk+QLjJg 6VfLuQSSaGjlOCZgdbKfd/+RFO+uIEn8rUAVSNECMWEZXriX7613t2Saer9fwRPvm2L7DWzgVGkW qQPabumDk3F2xmmFghcCAwEAAaNCMEAwDgYDVR0PAQH/BAQDAgEGMA8GA1UdEwEB/wQFMAMBAf8w HQYDVR0OBBYEFI/wS3+oLkUkrk1Q+mOai97i3Ru8MA0GCSqGSIb3DQEBCwUAA4IBAQBLQNvAUKr+ yAzv95ZURUm7lgAJQayzE4aGKAczymvmdLm6AC2upArT9fHxD4q/c2dKg8dEe3jgr25sbwMpjjM5 RcOO5LlXbKr8EpbsU8Yt5CRsuZRj+9xTaGdWPoO4zzUhw8lo/s7awlOqzJCK6fBdRoyV3XpYKBov Hd7NADdBj+1EbddTKJd+82cEHhXXipa0095MJ6RMG3NzdvQXmcIfeg7jLQitChws/zyrVQ4PkX42 68NXSb7hLi18YIvDQVETI53O9zJrlAGomecsMx86OyXShkDOOyyGeMlhLxS67ttVb9+E7gUJTb0o 2HLO02JQZR7rkpeDMdmztcpHWD9fMIIFWTCCBEGgAwIBAgIMPD6uL5K0fOjo8ln8MA0GCSqGSIb3 DQEBCwUAMF0xCzAJBgNVBAYTAkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTMwMQYDVQQD EypHbG9iYWxTaWduIFBlcnNvbmFsU2lnbiAyIENBIC0gU0hBMjU2IC0gRzMwHhcNMjAwOTIxMTQw OTQ5WhcNMjIwOTIyMTQwOTQ5WjCBnDELMAkGA1UEBhMCSU4xEjAQBgNVBAgTCUthcm5hdGFrYTES MBAGA1UEBxMJQmFuZ2Fsb3JlMRYwFAYDVQQKEw1Ccm9hZGNvbSBJbmMuMRwwGgYDVQQDExNSYXlh Z29uZGEgS29rYXRhbnVyMS8wLQYJKoZIhvcNAQkBFiByYXlhZ29uZGEua29rYXRhbnVyQGJyb2Fk Y29tLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAN9ijdrC8+HqBpo0E+Ls+FXg gOtAgdzwYtCbNN0FYITddIelxuEryOGaYFXqdi3WiAeyCbHIy0pRxs5Zqq0SLiAuaHbHc2t3cTGA WQ4i1+Z5ElQVIpZeHqb/exklZ7ZCZ8iUygtNsZqKyqgmFmDMkpEl0CT08yp8/xbhge9NVXOqmA0w O9iP6hfXOost0TwtIL/JlL94BiyaEOL7a3BwSRXhR2fJO17WpT8X27Dr0gJMx6X0rXkpiiF091Ml xVUYGnc0GLrYeHC2X4wJbUsgi+UFM/rVW0RKe5Sg4xmLXWc/rBhXDBVPeFVdN2dYsk5MyDRM/fXj cAA+xTX+SQGoND8CAwEAAaOCAdcwggHTMA4GA1UdDwEB/wQEAwIFoDCBngYIKwYBBQUHAQEEgZEw gY4wTQYIKwYBBQUHMAKGQWh0dHA6Ly9zZWN1cmUuZ2xvYmFsc2lnbi5jb20vY2FjZXJ0L2dzcGVy c29uYWxzaWduMnNoYTJnM29jc3AuY3J0MD0GCCsGAQUFBzABhjFodHRwOi8vb2NzcDIuZ2xvYmFs c2lnbi5jb20vZ3NwZXJzb25hbHNpZ24yc2hhMmczME0GA1UdIARGMEQwQgYKKwYBBAGgMgEoCjA0 MDIGCCsGAQUFBwIBFiZodHRwczovL3d3dy5nbG9iYWxzaWduLmNvbS9yZXBvc2l0b3J5LzAJBgNV HRMEAjAAMEQGA1UdHwQ9MDswOaA3oDWGM2h0dHA6Ly9jcmwuZ2xvYmFsc2lnbi5jb20vZ3NwZXJz b25hbHNpZ24yc2hhMmczLmNybDArBgNVHREEJDAigSByYXlhZ29uZGEua29rYXRhbnVyQGJyb2Fk Y29tLmNvbTATBgNVHSUEDDAKBggrBgEFBQcDBDAfBgNVHSMEGDAWgBRpcoJiMWeVRIV3kYDEBDZJ nXsLYTAdBgNVHQ4EFgQU1rE7oQJ7FiSTADFOqokePoGwIq4wDQYJKoZIhvcNAQELBQADggEBAD8I VcITGu1E61LQLR1zygqFw8ByKPgiiprMuQB74Viskl7pAZigzYJB8H3Mpd2ljve+GRo8yvbBC76r Gi5WdS06XI5vuImDJ2g6QUt754rj7xEYftM5Gy9ZMslKNvSiPPh1/ACx5w7ecD1ZK0YLMKGATeBD XybduRFIEPZBAjgJ5LOYT2ax3ZesfAkan1XJ97yLA93edgTTO2cbUAADTIMFWm4lI/e14wdGmK0I FtqJWw6DATg5ePiAAn+S0JoIL1xqKsZi2ioNqm02QMFb7RbB3yEGb/7ZLAGcPW666o5GSLsUnPPq YOfL/3X6tVfGeoi3IgfI+z76/lXk8vOQzQQxggJvMIICawIBATBtMF0xCzAJBgNVBAYTAkJFMRkw FwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTMwMQYDVQQDEypHbG9iYWxTaWduIFBlcnNvbmFsU2ln biAyIENBIC0gU0hBMjU2IC0gRzMCDDw+ri+StHzo6PJZ/DANBglghkgBZQMEAgEFAKCB1DAvBgkq hkiG9w0BCQQxIgQgFiMur+zwKb/6fpY9boABFD4P1ooiw3v1fCTlmA5RIaQwGAYJKoZIhvcNAQkD MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMjAxMTAyMDM1NTIwWjBpBgkqhkiG9w0BCQ8x XDBaMAsGCWCGSAFlAwQBKjALBglghkgBZQMEARYwCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMAsG CSqGSIb3DQEBCjALBgkqhkiG9w0BAQcwCwYJYIZIAWUDBAIBMA0GCSqGSIb3DQEBAQUABIIBAJTD grTi8e2pjpJipDxpnI8EcUoPuxj2NfjCyexIKW98Ok8o9QJrZPVc2ZM/7L9nJxhIkgyFcNVq1UUX 2HdYjJBMQXnf+vbiBXE0iUAB2+wZd9VCniJakaBXn50btWgI2G8Gj6wcmd3VBwjVJHRr3iHFlp3E dSmXzinFcOHgKXcPuU/ISNsh08ieSZmUYscLnqSWGrWtVKSQnu9qyc28TCQm1HfYXHOLBcsXkSyv 5A8KJ0zR6M33XOncD903K/gMm+FKxZRKkuEOjfopndaX3rk0NrAffNH9UvCccy7QRQdBhOb7JA0L m10h9HjZww8XThgtJ9l/RuPlBp/3iseFF7U= --00000000000010cabb05b317b797--